/*
* Copyright 2010 The Apache Software Foundation
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hbase.ipc;
import java.io.DataInput;
import java.io.DataOutput;
import java.io.IOException;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.hadoop.hbase.security.User;
/**
* The IPC connection header sent by the client to the server
* on connection establishment.
*/
class ConnectionHeader implements Writable {
protected String protocol;
public ConnectionHeader() {}
/**
* Create a new {@link ConnectionHeader} with the given <code>protocol</code>
* and {@link User}.
* @param protocol protocol used for communication between the IPC client
* and the server
* @param user {@link User} of the client communicating with
* the server
*/
public ConnectionHeader(String protocol, User user) {
this.protocol = protocol;
}
@Override
public void readFields(DataInput in) throws IOException {
protocol = Text.readString(in);
if (protocol.isEmpty()) {
protocol = null;
}
}
@Override
public void write(DataOutput out) throws IOException {
Text.writeString(out, (protocol == null) ? "" : protocol);
}
public String getProtocol() {
return protocol;
}
public User getUser() {
return null;
}
public String toString() {
return protocol;
}
}